In an attempt to determine some of the shared phonological traits among Pueblo Indians of the American Southwest, this paper compares the sound systems of Pueblo languages. The languages within the scope of this research are Zuni, Keresan (Acoma and Santa Ana), and Tanoan (Sandia, Taos, Jemez, and Santa Clara). It is noted that Pueblo Indians have lived together for many centuries and are culturally homogeneous, but are known for their linguistic conservativism or what has been called the "compartmentalization" of their languages, which presents alien linguistic traits from penetrating their own linguistic system. After a brief introduction to the classification of the languages, their sound systems are discussed in terms of consonants, vowels, suprasegmentals, and phonotactics. Most of the typological categories are drawn from Sherzer (1976) and Kaufman (1977). Appended are phoneme charts showing some phonemic symbols from Zuni, Acoma, Santa Ana, Sandia, and Jemez. Contains 40 references. (Author/LB)